How to test whether plants photosynthesize (part2)

Firstly I will show you guys a picture as this may be a little hard to understand without the diagram.

Aim : To investigate whether plants undergo respiration.

Hypothesis : I will observe that the limewater will turn chalky after a period of time. As when limewater comes in contact with carbon dioxide it will turn chalky. One of the products of the process respiration consists of carbon dioxide. So, if the limewater turns chalky i will immediately know that plants do indeed photosynthesize.

Theory : Plants photosynthesize in the day while they respire in the night as the presence of light is absent. So if there is no sunlight no photosynthesis will occur.

Materials: bell jar, a potted plant , a boiling tube, limewater, and a cork, a roll of scotchtape.

Steps

1)Firstly find a area where there is no sunlight, however ensure there is some light so you will be able to see.

2)Put a bell jar over the plant.

3) Scotchtape the boiling to the side of the brim of the bell jar leaving some space at the top.

4)Pour in some limewater into the boiling tube.

5) Seal the whole bell jar will a crake at the brim

Results :

1min- The limewater remain clear

2min- The limewater start to turn blurry

3min- The limewater becomes cloudy

Our opinion : The results have indeed shown us that the plant undergo the process respiration as the limewater turn chalky

Further explanation :While limewater is a clear solution, milk of lime on the other hand is a suspension of calcium hydroxide particles in water. These particles give it the milky aspect. It is commonly produced by reacting quicklime with an excess of water - usually 4 to 8 times the amount of water to the amount of quicklime.The calcium oxide will convert to the hydroxide according to the following reaction scheme. Sometimes the reaction is so much that it can cause temperature which water could boil.

The formula is shown below to explain in deeper to the experiment.

CaO + H₂O → Ca(OH)₂

My findings : There were certain errors which could not be avoided as they were essential to the success of the experiment. One of the errors was the light. As we on the light to observe the plant, the plant is also converting the light energy to glucose and oxygen. Hence, our result may not be as accurate.

Better theory : One method is that you can paint the bell jar black. But by doing that we were not able to observe how the limewater turns chalky overtime.

Conclusion : My hypothesis was confirmed. I did not only just use one plant to do the experiment. I used the same kind of plant and all of them show the same result.

Overall : My results generalizes that respiration in plants give out carbondioxide.

Further explanation : I will show you a video and it will surely give you a deeper understanding .